Jory accompanies Eddard to Petyr Baelish's brothel, still seeking illegitimate royal children. Jory is distracted by one of the whores while Eddard questions Mhaegen. On leaving, Lord Eddard has to break Jory's attention away from the woman he is staring at so they can leave. Outside they and two Stark guards are confronted by Jaime Lannister. Jaime has heard of his brother Tyrion's arrest and demands his release. Lord Eddard says it was done by his orders and if Jaime kills him Tyrion will die. Jaime has brought many Lannister men-at-arms. Jory begins to let Jaime know that if he is to threaten Eddard again, there would certainly be a fight. However, Jamie interrupts Jory, and he orders his men-at-arms to leave Eddard Stark alive, but to kill his men. They kill Jory's men with thrown spears. Jory attacks and kills two of Jaime's men before engaging Jaime himself. Jaime and Jory trap swords and Jaime stabs Jory through the left eye with a dirk during this event. Eddard, angered and stunned by Jory's death, exchanges blows with Jaime before a Lannister guardsman stabs him through the knee, ending the melee.[5]

Jory's role in the series is somewhat expanded from the books. Dialogue from several different Stark guardsmen is given to Jory (most notably his promise to Arya that he will keep Eddard safe, which in the book was given by a guardsman named Desmond) and the scenes where he talks to Ser Hugh and later Jaime Lannister are inventions of the TV series. In the book he is not killed personally by Jaime, but by the Lannister guardsmen that ultimately overwhelmed the small Stark contingent.

According to the TV series official pronunciation guide developed for the cast and crew, "Cassel" is pronounced "Cuss-EL", not "Kas-el" (that is, "Cassel" doesn't rhyme with "castle").